Measuring device and method of operating a measuring device

A measuring device, comprising:

• a supply device with a buffer storage and loads including a current loop interface, a controller, and a measuring unit;
• wherein the current loop interface is designed for connection to a current loop and for communication via the current loop;
• wherein the supply device is designed for being supplied with energy from the current loop and for supplying energy to the loads using the buffer storage;
• wherein a voltage membership function is stored in the controller, which assigns a buffer voltage of the buffer storage a voltage membership degree to a voltage fuzzy set of sufficient buffer voltages;
• wherein at least one operating parameter membership function is stored in the controller, which assigns an operating parameter value of the measuring device an operating parameter membership degree to an operating parameter fuzzy set of sufficient operating parameter values;
• wherein the controller is designed to determine at least one operating parameter value and to measure a first buffer voltage at a first time;
• wherein the controller is designed to carry out a fuzzy algorithm having the following method steps:
• determining the voltage membership degree of the first buffer voltage using the voltage membership function;
• determining the at least one operating parameter membership degree of the at least one operating parameter value using the at least one operating parameter membership function;
• determining a result membership degree by combining the voltage membership degree and the at least one operating parameter membership degree with each other;
• and
• wherein, using the result membership degree, the controller is designed to determine a further method step which can be is executed by the measuring device and which requires no more than an available energy for a duration of an execution of the method step.